Position(s): Main Vocalist, Lead Dancer, Sub-Rapper, Center, Maknae
Religion: Buddhist
Nicknames: Kookie, JK, Seagull, Golden Maknae, Kook, Bunny, Justin Seagull, Ggukie, The one in the middle, Muscle Pig, Guk, Jungshook, Jeonggukie, Gukkie, Jeon Cena, Fetus Kookie, International Playboy, Jungoo ( by fans )
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